Support subpixel values for text-shadow and box-shadow

Source/core/rendering/style/RenderStyle.cpp

 /*
  * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Adobe Systems Incorporated. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 1257 matching lines @@
     top = 0;
     right = 0;
     bottom = 0;
     left = 0;
 
     size_t shadowCount = shadowList ? shadowList->shadows().size() : 0;
     for (size_t i = 0; i < shadowCount; ++i) {
         const ShadowData& shadow = shadowList->shadows()[i];
         if (shadow.style() == Inset)
             continue;
-        int blurAndSpread = shadow.blur() + shadow.spread();
+        float blurAndSpread = shadow.blur() + shadow.spread();
 
         top = min<LayoutUnit>(top, shadow.y() - blurAndSpread);
         right = max<LayoutUnit>(right, shadow.x() + blurAndSpread);
         bottom = max<LayoutUnit>(bottom, shadow.y() + blurAndSpread);
         left = min<LayoutUnit>(left, shadow.x() - blurAndSpread);
     }
 }
 
 LayoutBoxExtent RenderStyle::getShadowInsetExtent(const ShadowList* shadowList) const
 {
     LayoutUnit top = 0;
     LayoutUnit right = 0;
     LayoutUnit bottom = 0;
     LayoutUnit left = 0;
 
     size_t shadowCount = shadowList ? shadowList->shadows().size() : 0;
     for (size_t i = 0; i < shadowCount; ++i) {
         const ShadowData& shadow = shadowList->shadows()[i];
         if (shadow.style() == Normal)
             continue;
-        int blurAndSpread = shadow.blur() + shadow.spread();
+        float blurAndSpread = shadow.blur() + shadow.spread();
         top = max<LayoutUnit>(top, shadow.y() + blurAndSpread);
         right = min<LayoutUnit>(right, shadow.x() - blurAndSpread);
         bottom = min<LayoutUnit>(bottom, shadow.y() - blurAndSpread);
         left = max<LayoutUnit>(left, shadow.x() + blurAndSpread);
     }
 
     return LayoutBoxExtent(top, right, bottom, left);
 }
 
 void RenderStyle::getShadowHorizontalExtent(const ShadowList* shadowList, LayoutUnit &left, LayoutUnit &right) const
 {
     left = 0;
     right = 0;
 
     size_t shadowCount = shadowList ? shadowList->shadows().size() : 0;
     for (size_t i = 0; i < shadowCount; ++i) {
         const ShadowData& shadow = shadowList->shadows()[i];
         if (shadow.style() == Inset)
             continue;
-        int blurAndSpread = shadow.blur() + shadow.spread();
+        float blurAndSpread = shadow.blur() + shadow.spread();
 
         left = min<LayoutUnit>(left, shadow.x() - blurAndSpread);
         right = max<LayoutUnit>(right, shadow.x() + blurAndSpread);
     }
 }
 
 void RenderStyle::getShadowVerticalExtent(const ShadowList* shadowList, LayoutUnit &top, LayoutUnit &bottom) const
 {
     top = 0;
     bottom = 0;
 
     size_t shadowCount = shadowList ? shadowList->shadows().size() : 0;
     for (size_t i = 0; i < shadowCount; ++i) {
         const ShadowData& shadow = shadowList->shadows()[i];
         if (shadow.style() == Inset)
             continue;
-        int blurAndSpread = shadow.blur() + shadow.spread();
+        float blurAndSpread = shadow.blur() + shadow.spread();
 
         top = min<LayoutUnit>(top, shadow.y() - blurAndSpread);
         bottom = max<LayoutUnit>(bottom, shadow.y() + blurAndSpread);
     }
 }
 
 Color RenderStyle::colorIncludingFallback(int colorProperty, bool visitedLink) const
 {
     Color result;
     EBorderStyle borderStyle = BNONE;
@@ skipping 256 matching lines @@
 }
 
 void RenderStyle::setBorderImageOutset(const BorderImageLengthBox& outset)
 {
     if (surround->border.m_image.outset() == outset)
         return;
     surround.access()->border.m_image.setOutset(outset);
 }
 
 } // namespace WebCore